The Curiosity rover has discovered ancient organic molecules on Mars, embedded within sedimentary rocks that are billions of years old. News Release: https://www.nasa.gov/press-release/nasa-finds-ancient-organic-material-mysterious-methane-on-mars

Credit: NASA’s Goddard Space Flight Center/Dan Gallagher

Graphics from the NASA-TV broadcast of this discovery are available at: http://svs.gsfc.nasa.gov/12967